Tilda Lindstam is carrying a mini Pashli satchel by 3.1 Phillip Lim.
You may find similar or bigger Pashli bags at following places :
at Net-a-porter
Mini Pashli leather and elaphe shoulder bag
at farfetch
3.1 PHILLIP LIM Pashli satchel
at thecorner
3.1 PHILLIP LIM Medium Leather Bag